A discovrse mathematical on the variation of the magneticall needle
Subtitle: Together with its admirable diminution lately discovered
By: By Henry Gellibrand ...
Publisher: W. Iones
Published: 1635
Place of publication: London
Language: eng
Number of pages: 22
Subjects: Geomagnetism; Early works to 1800; Magnetic declination
Other titles: Discourse mathematical on the variation of the magnetical needle.
Notes: Signatures: A-C⁴.